[Sync EN] uri: Fix markup typo in `<refpurpose>` for various getters

PR: `https://github.com/php/doc-en/pull/5475` (2026-04-06)

**Новые файлы EN (ещё не переведены)**
- `reference/uri/uri/rfc3986/uri/getpassword.xml`
- `reference/uri/uri/rfc3986/uri/getpath.xml`
- `reference/uri/uri/rfc3986/uri/getport.xml`
- `reference/uri/uri/rfc3986/uri/getquery.xml`
- `reference/uri/uri/rfc3986/uri/getrawfragment.xml`

